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From Richard Eckart de Castilho <eck...@ukp.informatik.tu-darmstadt.de>
Subject Re: [jira] [Created] (UIMA-2419) Initial view for sofa unaware components not automatically created
Date Tue, 12 Jun 2012 21:23:13 GMT
Hi Eddie,

I'd suggest I mount a piece of code to programmatically create such a descriptor. For an example
I should be able to do that with reasonable effort and lines of code even without uimaFIT.
If that's fine for you as well, stay tuned.

-- Richard

Am 11.06.2012 um 20:11 schrieb Eddie Epstein:

> Hi Richard,
> 
> Can you be a bit more explicit what the failing scenario is? I'm
> definitely confused by wrapping a CR in an AE descriptor. Is it
> possible to paste here an aggregate descriptor using sample components
> from the UIMA SDK that demonstrates the problem?
> 
> Thanks,
> Eddie
> 
> 
> On Sun, Jun 10, 2012 at 2:11 PM, Richard Eckart de Castilho
> <eckart@ukp.informatik.tu-darmstadt.de> wrote:
>> Am 10.06.2012 um 19:50 schrieb Richard Eckart de Castilho:
>> 
>>> I guess another option should be to change CollectionReaderAdapter to create
any missing initial view for sofa-unaware readers. That would not have any side other component
type and it would solve the problem for my use-case as well. The problem is, that doesn't
work, because the PrimitiveAnalysisEngine_impl.classAnalysisComponentProcess() already tries
to access the mapped view and fails. Changing that to test if the mAnalysisComponent is a
sofa-unaware CollectionReaderAdapter and creating a new view only in that case looks rather
like a hack to me, although it would probably resolve the situation. I didn't test that yet,
but if you think it reasonable, I can check it.
>> 
>> Actually, the exception triggered by PrimitiveAnalysisEngine_impl.classAnalysisComponentProcess()
when accessing the non-existing mapped CAS seems completely redundant, because if the analysis
engine delegate is a sofa-unaware CasMultiplier or CollectionReader(Adapter) that doesn't
actually use its input CAS, it doesn't matter at all a that point that the mapped view does
not exist. It's enough if the mapped initial view is set up in any new CAS created for the
CasMultiplier/CollectionReader.
>> 
>> So, there are many possible ways. I personally don't find to very attractive to change
the CollectionReaderDescription because I think that has quite some overhead. Even if that
was done, the problem would probably remain for mapped CasMultipliers. I like it that UIMA
internally treats all components equally, so I would prefer doing something that this also
works out well when sofa mappings are used on components that produce new CASes and potentially
do not at all make used of the input CAS.
>> 
>> -- Richard

-- 
------------------------------------------------------------------- 
Richard Eckart de Castilho
Technical Lead
Ubiquitous Knowledge Processing Lab (UKP-TUD) 
FB 20 Computer Science Department      
Technische Universität Darmstadt 
Hochschulstr. 10, D-64289 Darmstadt, Germany 
phone [+49] (0)6151 16-7477, fax -5455, room S2/02/B117
eckart@ukp.informatik.tu-darmstadt.de 
www.ukp.tu-darmstadt.de 
Web Research at TU Darmstadt (WeRC) www.werc.tu-darmstadt.de
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